CN111698737B

CN111698737B - Method and device for reselecting boundary of shared carrier

Info

Publication number: CN111698737B
Application number: CN201911373712.7A
Authority: CN
Inventors: 李志军; 张新; 陈建刚; 鲁娜; 毛聪杰; 桂烜; 赵晓垠
Original assignee: China Telecom Corp Ltd
Current assignee: China Telecom Corp Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2021-01-12
Anticipated expiration: 2039-12-27
Also published as: CN111698737A

Abstract

The disclosure provides a method and a device for reselecting a boundary of a shared carrier. The boundary reselection method comprises the following steps: starting corresponding pilot frequency measurement according to the attribution of User Equipment (UE) in an idle state, wherein the pilot frequency measurement of different carriers is adopted for the UE with different attributions; and determining a reselection strategy of the UE according to the comparison between the pilot frequency measurement result and a reselection threshold value, wherein different reselection threshold values are set for different attributive UEs.

Description

Method and device for reselecting boundary of shared carrier

Technical Field

The present disclosure relates to the field of communications, and in particular, to a method and an apparatus for reselecting a boundary of a shared carrier.

Background

Currently, two network architectures are mainly adopted for global 5G business: NSA (Non-standard one, Non-independent networking) and SA (standard one, independent networking). The SA scheme combines a 5G core network and a 5G base station, and can bring all characteristics and functions of the 5G network.

The 5G operating band is high, the number of base stations is large and expensive, and the power consumption is high (about 3 times of 4G). In order to construct a 5G base station at low cost and high efficiency, it is inevitable that each operator co-constructs and shares the base station. Currently, an SA shared carrier technology is adopted indoors, namely, a plurality of operators adopt a part of common frequency bands, for example, indoor special frequency bands 3300-3400M are adopted indoors for telecommunication and communication; and each operator establishes the network independently outdoors. When a user moves from indoor to outdoor in an idle state, different users need to reselect to different target networks (unshared stations).

Disclosure of Invention

In order to reduce the problem of reselection of the boundary of the shared carrier under the SA networking, the invention provides a boundary area reselection optimization method, which effectively guarantees the user experience.

According to a first aspect of the embodiments of the present disclosure, there is provided a boundary reselection method, including:

starting corresponding pilot frequency measurement according to the attribution of User Equipment (UE) in an idle state, wherein the pilot frequency measurement of different carriers is adopted for the UE with different attributions;

and determining a reselection strategy of the UE according to the comparison between the pilot frequency measurement result and a reselection threshold value, wherein different reselection threshold values are set for different attributive UEs.

In some embodiments, the border reselection method further comprises: and determining the attribution of the UE according to the public land mobile network PLMN.

In some embodiments, the turning on the corresponding inter-frequency measurement according to the home of the UE in the idle state includes:

and starting pilot frequency measurement corresponding to the attribution of the UE according to the priorities of the serving cell and the target neighbor cell of the UE, wherein the carrier of the target neighbor cell is different from the carrier of the serving cell, and the priorities of the UEs of different attributions are set differently.

In some embodiments, starting inter-frequency measurement corresponding to the UE affiliation according to the priority of the serving cell and the target neighboring cell of the UE includes:

and for the condition that the priority of the target adjacent cell of the UE is higher than that of the service cell, starting the pilot frequency measurement of the UE on the target adjacent cell all the time.

In some embodiments, determining the reselection policy of the UE based on the comparison of the result of the inter-frequency measurement with the reselection threshold value comprises:

and under the condition that the RSRP of the target adjacent cell measured by the UE is greater than the sum of the cell minimum receiving level of the target adjacent cell and a first threshold value, determining that the UE reselects to the corresponding target adjacent cell, wherein the first threshold values of the UEs of different affiliations are different.

and for the condition that the priority of the target adjacent cell of the UE is lower than that of the serving cell, under the condition that the Reference Signal Received Power (RSRP) of the serving cell measured by the UE is smaller than the sum of the cell minimum receiving level of the serving cell and a second threshold value, measuring the target adjacent cell corresponding to the attribution of the UE, wherein the second threshold values of the UE which are different in attribution are different.

and under the condition that the RSRP of the serving cell measured by the UE is lower than the sum of the cell minimum receiving level of the serving cell and the third threshold value, and the RSRP of the target adjacent cell is greater than the sum of the cell minimum receiving level of the target adjacent cell and the fourth threshold value, determining that the UE reselects to the corresponding target adjacent cell.

In some embodiments, the third threshold values are different for different homed UEs and the fourth threshold values are different for different homed UEs.

According to a second aspect of the embodiments of the present disclosure, there is provided a boundary reselection apparatus including:

the measurement starting module is configured to start corresponding pilot frequency measurement according to the attribution of the UE in the idle state, wherein the pilot frequency measurement of different carriers is adopted for the UE with different attributions;

and the strategy determining module is configured to determine a reselection strategy of the UE according to the comparison between the result of the pilot frequency measurement and a reselection threshold value, wherein different reselection threshold values are set for different attributive UEs.

In some embodiments, the border reselection device further comprises: a home determination module configured to determine a home of the UE according to a public land mobile network PLMN.

According to a third aspect of the embodiments of the present disclosure, there is provided a boundary reselection apparatus including: a memory configured to store instructions; a processor coupled to the memory, the processor configured to perform one or more steps of implementing a boundary reselection method as described in any of the embodiments above based on instructions stored in the memory.

According to a fourth aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided, in which computer instructions are stored, and when executed by a processor, implement one or more steps in a boundary reselection method according to any of the embodiments described above.

According to a fifth aspect of the embodiments of the present disclosure, there is provided a terminal, including: the border reselection device of any of the above embodiments.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:

fig. 1 is a schematic diagram of a border reselection mechanism in accordance with some embodiments of the present disclosure;

fig. 2 is a flow diagram of a boundary reselection method according to some embodiments of the present disclosure;

FIG. 3 is a schematic block diagram of a border reselection device according to some embodiments of the present disclosure;

fig. 4 is a schematic structural diagram of a boundary reselection device according to further embodiments of the present disclosure.

It should be understood that the dimensions of the various parts shown in the figures are not drawn to scale. Further, the same or similar reference numerals denote the same or similar components.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials and values set forth in these embodiments are to be construed as illustrative only and not as limiting unless otherwise specifically stated.

The use of the word "comprising" or "comprises" and the like in this disclosure means that the elements listed before the word encompass the elements listed after the word and do not exclude the possibility that other elements may also be encompassed.

All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the art known to the inventors and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

Under SA networking, when User Equipment (UE) moves from indoor to outdoor in an idle state, different homed UEs need to be handed over to different unshared stations. The present disclosure provides an improved reselection mechanism, which separates UEs by combining a PLMN (Public Land Mobile Network), and sets different reselection mechanisms for UEs of different affiliations in a 5G cell sharing a carrier, so as to implement that the UE directly reselects to a non-shared base station of an affiliation party, thereby avoiding ping-pong reselection and reselection failure.

The border reselection mechanism is described below in conjunction with fig. 1 and table 1. Fig. 1 is a schematic diagram of a border reselection mechanism in accordance with some embodiments of the present disclosure. Table 1 is reselection priority settings for two different homed users according to some embodiments of the present disclosure.

As shown in fig. 1, in the 5G shared carrier cell of the SA, the carriers of the UEs belonging to different countries are the same, for example, the frequencies are all F3 (e.g. 3300-. When the UE moves from indoor to outdoor in the idle state, different homed UEs may reselect to unshared stations of different carriers. In some embodiments, the UE may be partitioned based on the PLMN. Different operators use cellular mobile communication networks of different standards, i.e. different PLMNs. For example, the UE1 that is owned by PLMN1 may reselect to the unshared cell corresponding to PLMN1, which corresponds to the unshared carrier F1 (e.g., 3400-3500M). Similarly, the UE2 that belongs to the PLMN2 may reselect to the unshared cell corresponding to the PLMN2, which corresponds to the unshared carrier F2 (e.g., 3500-.

In the determination of the reselection strategy, different frequency reselection priorities are set for different home UEs. For example, multiple sets of frequency priority lists may be set, and the frequency priority lists may be issued for different UEs by using the PLMN as an index. For example, as shown in table 1, for a UE belonging to PLMN1, the priority of the non-shared carrier F1 is set to the highest first priority, the priority of the shared carrier F3 is set to the second highest priority, and the operator LTE frequency point corresponding to F1 is set to the lowest third priority. Similarly, for the UE belonging to PLMN2, the priority of the non-shared carrier F2 is set to the highest first priority, the priority of the shared carrier F3 is set to the second highest second priority, and the operator LTE frequency point corresponding to F2 is set to the lowest third priority.

Priority setting	PLMN1	PLMN2
			First priority	F1	F2
Second priority	F3	F3
			Third priority	Operator LTE frequency point corresponding to F1	LTE frequency point of operator corresponding to F2

Table 1: reselection priority setting for two different attribution users

When the UE reselects, the UE also uses the exclusive reselection parameters besides the exclusive frequency priority. Therefore, the UE can directly reselect the own non-shared carrier cell, thereby avoiding searching the non-shared base station signal of the other party, accelerating reselection and avoiding ping-pong interference.

Fig. 2 is a flow diagram of a boundary reselection method according to some embodiments of the present disclosure. Table 2 is a list of reselection parameters for two different homed users in case of reselection from a low priority cell to a high priority cell according to some embodiments of the present disclosure. Table 3 is a list of reselection parameters for two different homed users in case of reselection from a high priority cell to a low priority cell according to some embodiments of the present disclosure.

As shown in fig. 2, the method for reselecting a boundary of a shared carrier includes steps S2-S4.

In step S2, corresponding inter-frequency measurement is started according to the affiliation of the UE in the idle state.

As previously described, the home of the UE may be determined from the PLMN. The carrier of the target neighbor cell is different from the carrier of the serving cell.

Reselection includes reselection to both a target neighbor cell with a higher priority than the serving cell and a target neighbor cell with a lower priority than the serving cell. The corresponding pilot frequency measurement is started according to the priority of the serving cell and the target neighbor cell of the UE. The priority settings of different home UEs are different.

In some embodiments, for a case that the priority of the target neighboring cell of the UE is higher than that of the serving cell, the inter-frequency measurement of the target neighboring cell by the UE may be always turned on.

In other embodiments, to save energy consumption, the target neighboring cell corresponding to the UE may also be measured when the reference signal received power RSRP of the serving cell measured by the UE is less than the sum of the cell minimum received level Qrxlevmin of the serving cell and the inter-frequency cell reselection measurement threshold Snonintrasearch. The parameters are shown in table 2. For example, Qrxlevmeas < Snonintrasearch + Qrxlevmin, which satisfies the serving cell, starts the measurement. Qrxlevmeas represents the measured RSRP. The Snonintrasearch of different homed UEs is different. And the carriers of the target adjacent cells corresponding to the UE with different attributions are different. This also applies to the case where the priority of the target neighbor of the UE is lower than the priority of the serving cell. The parameters are shown in table 3.

Shared carrier cell (based on PLMN1)	Shared carrier cell (based on PLMN2)
		Qrxlevmin	Qrxlevmin
SnonIntraSearch	SnonIntraSearch
		ThreshX-High(F1)	ThreshX-High(F2)

Table 2: in case of a reselection from a low priority cell to a high priority cell, the reselection parameter lists of two different homed users

In step S4, a reselection policy of the UE is determined according to the comparison between the result of the inter-frequency measurement and the reselection threshold value. And setting different reselection threshold values for the UE with different attributions.

And for the condition that the priority of the target adjacent cell of the UE is higher than that of the serving cell, determining that the UE reselects to the corresponding target adjacent cell under the condition that the RSRP of the target adjacent cell measured by the UE is greater than the sum of the cell minimum receiving level Qrxlevmin of the target adjacent cell and the threshold ThreshX-High for reselecting to the High-priority cell. The parameters are shown in table 2. The second threshold values of different home UEs are different.

For example, for UE1 belonging to PLMN1, the threshold for reselection to the High priority cell is ThreshX-High (F1), and Qrxlevmeas (F1) > ThreshX-High (F1) + Qrxlevmin is satisfied, i.e., reselection; for the UE2 belonging to the PLMN2, the threshold for reselecting to the High priority cell is ThreshX-High (F2), i.e., Qrxlevmeas (F2) > ThreshX-High (F2) + Qrxlevmin is satisfied.

And for the situation that the priority of the target adjacent cell of the UE is lower than the priority of the serving cell, determining that the UE reselects to the corresponding target adjacent cell under the condition that the RSRP of the serving cell measured by the UE is lower than the sum of the cell minimum receiving level of the serving cell and the measuring threshold Thresherving-Low of the high-priority serving cell when reselecting the Low-priority cell, and the RSRP of the target adjacent cell is greater than the sum of the cell minimum receiving level of the target adjacent cell and the threshold ThreshX-Low of the target adjacent cell. The parameters are shown in table 3.

Shared carrier cell (based on PLMN1)	Shared carrier cell (based on PLMN2)
		Qrxlevmin	Qrxlevmin
SnonIntraSearch	SnonIntraSearch
		ThreshX-Low(F3)	ThreshX-Low(F3)
ThreshServing-LowP(F1)	ThreshServing-LowP(F2)

Table 3: reselection parameter lists for two different affiliated users in case of a reselection from a high priority cell to a low priority cell

For example, for UE1 belonging to PLMN1, the UE reselects to the Low priority target neighbor if Qrxlevmeas (F3) > ThreshX-Low (F3) + Qrxlevmin of the Low priority neighbor and Qrxlevmin (F1) < thresherving-Low (F1) + Qrxlevmin of the high priority serving cell are simultaneously satisfied. Similarly, for UE2 belonging to PLMN2, the UE will reselect to the Low priority target neighbor if Qrxlevmeas (F3) > ThreshX-Low (F3) + Qrxlevmin of the Low priority neighbor and Qrxlevmin (F2) < thresherving-Low (F2) + Qrxlevmin of the high priority serving cell are simultaneously satisfied. Both ThreshX-Low and Thresherving-Low may be different for different home UEs.

Fig. 3 is a schematic structural diagram of a border reselection device according to some embodiments of the present disclosure.

As shown in fig. 3, the apparatus for reselecting a boundary of a shared carrier includes: a measurement starting module 320, configured to start corresponding inter-frequency measurement according to the affiliation of the UE in the idle state, where the inter-frequency measurement of different carriers is adopted for UEs of different affiliations, for example, step S2 is executed; the policy determining module 340 is configured to determine a reselection policy of the UE according to a comparison between a result of the inter-frequency measurement and a reselection threshold, where different reselection thresholds are set for different homed UEs, for example, step S4 is executed.

In some embodiments, the border reselection device further comprises: a home determination module 360 configured to determine a home of the UE according to the PLMN.

Fig. 4 is a schematic structural diagram of a boundary reselection device for a shared carrier according to further embodiments of the present disclosure. As shown in fig. 4, the boundary reselection device includes a memory 41 and a processor 42.

The memory 41 is used to store instructions. The processor 42 is coupled to the memory 41. The processor 42 is configured to execute a method of performing a boundary reselection method as described in relation to any of the preceding embodiments, based on instructions stored in the memory.

As shown in fig. 4, the apparatus further includes a communication interface 43 for information interaction with other devices. Meanwhile, the device also comprises a bus 44, and the processor 42, the communication interface 43 and the memory 41 are communicated with each other through the bus 44.

The Memory 41 may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM). Such as at least one disk storage. The memory 41 may also be a memory array. The storage 41 may also be partitioned, and the blocks may be combined into virtual volumes according to certain rules.

Further, the processor 42 may be a central processing unit, or may be an ASIC (Application Specific Integrated Circuit), or one or more Integrated circuits configured to implement embodiments of the present disclosure.

The present disclosure also provides a computer-readable storage medium. The computer readable storage medium stores computer instructions, and when executed by the processor, the computer readable storage medium implements the boundary reselection method according to any of the embodiments.

In some embodiments, the functional modules may be implemented as a general purpose Processor, a Programmable Logic Controller (PLC), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or other Programmable Logic device, discrete Gate or transistor Logic, discrete hardware components, or any suitable combination thereof, for performing the functions described in this disclosure.

In some embodiments, the border reselection is initiated by the terminal. The embodiment of the disclosure further provides a terminal, which includes the boundary reselection device in any one of the foregoing embodiments.

In the above embodiment, for a scenario in which different operators reselect from a shared carrier to a non-shared carrier, users of different operators are separated according to a PLMN, and a differentiated reselection policy is set. The PLMN and reselection frequency priority are combined, so that different operators can set different reselection strategies. The user is accurately separated based on the PLMN, the problem that different operators can use different threshold value strategies in the reselection process from the shared carrier to the non-shared carrier by different operators is solved, ping-pong reselection and repeated reselection are avoided, and other networks reselected to the non-shared area are avoided.

So far, embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A border reselection method, comprising:

according to the attribution of User Equipment (UE) in an idle state, according to the priority of a serving cell and a target neighbor cell of the UE, starting pilot frequency measurement corresponding to the attribution of the UE, and measuring the target neighbor cell corresponding to the attribution of the UE under the condition that the priority of the target neighbor cell of the UE is lower than the priority of the serving cell and the Reference Signal Received Power (RSRP) of the serving cell measured by the UE is smaller than the sum of the minimum receiving level of the cell of the serving cell and a first threshold value, wherein the pilot frequency measurement of different carriers is adopted for the UE with different attributions, the carriers of the target neighbor cell are different from the carriers of the serving cell, the priority settings of the UE with different attributions are different, and the first threshold values of the UE with different attributions are different;

2. The border reselection method of claim 1, further comprising: and determining the attribution of the UE according to the public land mobile network PLMN.

3. The border reselection method of claim 1, wherein the turning on inter-frequency measurement corresponding to the UE attribution according to the priorities of the serving cell and the target neighboring cell of the UE comprises:

4. The border reselection method of claim 3, wherein determining the reselection policy of the UE based on the comparison of the inter-frequency measurement result with the reselection threshold value comprises:

and under the condition that the RSRP of the target adjacent cell measured by the UE is greater than the sum of the cell minimum receiving level of the target adjacent cell and a second threshold value, determining that the UE reselects to the corresponding target adjacent cell, wherein the second threshold values of the UEs with different attributions are different.

5. The border reselection method of claim 1, wherein determining the reselection policy of the UE based on the comparison of the inter-frequency measurement result with the reselection threshold value comprises:

6. The border reselection method of claim 5, wherein the third threshold values of the different home UEs are different and the fourth threshold values of the different home UEs are different.

7. A border reselection device comprising:

the measurement starting module is configured to start pilot frequency measurement corresponding to the UE affiliation according to the affiliation of User Equipment (UE) in an idle state and the priority of a serving cell and a target neighbor cell of the UE, and for the situation that the priority of the target neighbor cell of the UE is lower than the priority of the serving cell, the target neighbor cell corresponding to the UE affiliation is measured under the condition that the Reference Signal Received Power (RSRP) of the serving cell measured by the UE is smaller than the sum of the cell minimum receiving level of the serving cell and a first threshold value, wherein pilot frequency measurement of different carriers is adopted for different affiliations of the UE, the carriers of the target neighbor cell are different from the carriers of the serving cell, the priorities of different affiliations of the UE are set to be different, and the first threshold values of different affiliations of the UE are different;

8. The border reselection device of claim 7, further comprising:

a home determination module configured to determine a home of the UE according to a public land mobile network PLMN.

9. A border reselection device comprising:

a memory configured to store instructions;

a processor coupled to the memory, the processor configured to perform one or more steps of implementing the boundary reselection method of any of claims 1-6 based on instructions stored by the memory.

10. A computer readable storage medium, wherein the computer readable storage medium stores computer instructions which, when executed by a processor, implement one or more steps of the border reselection method of any of claims 1-6.

11. A terminal, comprising: the border reselection device of any of claims 7-9.